sched/core: Fix sched_getaffinity() return value kerneldoc comment

zevweiss · Ingo Molnar · commit 599b4840b0ea · 2016-06-27T12:53:12.000+02:00
Previous version was probably written referencing the man page for glibc's wrapper, but the wrapper's behavior differs from that of the syscall itself in this case. Signed-off-by: Zev Weiss <zev@bewilderbeest.net> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1466975603-25408-1-git-send-email-zev@bewilderbeest.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
@@ -4759,7 +4759,8 @@ long sched_getaffinity(pid_t pid, struct cpumask *mask)
  * @len: length in bytes of the bitmask pointed to by user_mask_ptr
  * @user_mask_ptr: user-space pointer to hold the current cpu mask
  *
- * Return: 0 on success. An error code otherwise.
+ * Return: size of CPU mask copied to user_mask_ptr on success. An
+ * error code otherwise.
  */
 SYSCALL_DEFINE3(sched_getaffinity, pid_t, pid, unsigned int, len,
 		unsigned long __user *, user_mask_ptr)
